Casing and supporting foot structure



Jan. 26, 1937. w. o. LANGlLLE CASING AND SUPPORTING FOOT STRUCTURE FiledAug. 15, 1935 Patented Jan. 26, 1937 UNITED STATES PATENT OFFICE.

CASIN G AND SUPPORTING FOOT STRUCTURE Application August 15, 1935,Serial No. 36,339

6 Claims.

This invention relates to a hollow casing and supporting foot structure,such, for example, as used to house thev working parts of afoot-operated motor-controller cr rheostat.

The invention has for an object to provide an improved and simplifiedcasing and supporting foot structure which may be readily manufacturedand assembled and in which the feet are firmly gripped by the casing.

With the above and other objects in view, as will hereinafter appear,the invention comprises the devices, combinations and arrangements ofparts hereinafter set forth and illustrated in the accompanying drawingof a preferred embodiment of the invention, from which the severalfeatures of the invention and the advantages attained thereby will bereadily understood by those skilled in the art.

A feature of the invention is the provision for clamping the supportingfeet between the separable cover and base members of the casing. Anotherfeature of the invention is the provision of foot-receiving pockets inthe casing whereby the feet are conned in assembled relation with thecasing prior to the tightening oi the footclamping means.

In the accompanying drawing Fig. 1 is a longitudinal vertical sectionthrough a sewing machine motor controller or rheostat embodying theinvention. Fig. 2 is a top plan view of the controller. Fig. 3 is asection on the line 3 3, Fig. 2. Fig. 4 is a bottom plan View of one endof the controller casing. Fig. 5 is a fragmentary top plan view of theremovable bottom member of the controller casing. Fig. 6 is a section onthe line 6-6, Fig. 2, and Fig. '7 is a perspective View of one of thesupporting feet of the controller.

The controller casing comprises a top or upper member A and a bottommember B, each of which is preferably molded in one piece from phenoliccondensation material or articial resin, such as bakelite, which doesnot soften under heat conditions and has good mechanical strength andhigh electrical insulating properties. The top member A is preferably ofhollow rectangular form and may comprise a to-p wall I and side 1 walls2 which latter are formed with internal corner ledges 3. The bottommember B may be substantially flat and of rectangular form and ispreferably detachably secured to the top member A, within the side Walls2 of the latter, by means of the corner screws 4 which are screwed intothe ledges 3. The bottom member B preferably has rounded corners 5 whichare spaced from the rounded internal corner walls 6 of the top member Ato form pockets to receive and position the vertical shank 'I of therubber feet C. The Shanks 'I of the feet C preferably have anges 8 attheir upper ends overlapping the bottom member B and these flanges arepref- 5 erably clamped by and between the bottom member B and the ledges3 of the top member A. The feet C may have at their lower ends the treadportions 9 which may be of annular form and which may underlap thebottom member B 10 although these details are not essential to theinvention.

The bottom member B may support the usual carbon compression typerheostat unit I il, such disclosed in the U. S. patent to Chason, No. 151,643,292; dated Sept. 27, 1927. The resistance of such a rheostat iscontrolled by endwise movement of its operating pull-rod II biased by arecovery spring I2. The pull-rod II carries the threaded adjustable nutI3 engaged by the pull 20 strap I4 pivotally connected at I5 to thelever I 6 which is fulcrumed at II on the bottom member B and carries across-bar I8 engaged by the lower end faces IS of the pedal slide 2i)mounted in the top member A of the casing. A pair of 25 recovery springs2I connected to the ends of the cross-bar I8 are anchored to the horns22 rising from the base B. The rheostat I0 and actuating parts thereforwithin the casing A, B, form no part of the present invention. 30

The structure may be readily assembled by rst applying the feet C to thecorners 5 of the base B, as shown in Fig. 5. The cover A is then appliedto the base B and the corner pockets thus formed conne the feet againstaccidental displacement from the corners 5 until the screws 4 aretightened. The feet C, being preferably made of soft rubber, have atendency to cling to the carpet or oor surface upon which the rheo- 0stat is used and prevent creeping of the rheostat away from the positionin which it was placed for operation.

It is to be understood that the foregoing detailed description of apreferred embodiment of 45 the invention is not to be construed inlimitation of the invention to details of construction and relativearrangements of parts not particularly specied in the appended claims.

Having thus set forth the nature of the in- 50 vention, what I claimherein is:-

1. A hollow casing having two separable sections formed withfoot-positioning pockets, and supporting feet having vertical shankportions positioned in said pockets and horizontal termi- 55 nal shankportions clamped by and between said separable sections.

2. A casing comprising a hollow top member having a top wall and sidewalls formed wit-h in ternal ledges, a bottom member detachably securedto said top member within the side walls of the latter, and feet havingVertical shank portions disposed within and concealed by said sidewalls, and terminal shank anges clamped between said bottom member andthe ledges of said top member, said feet having tread portions adaptedto rest upon a at surface and support said casing.

3. A casing comprising a hollow top member having a top wall and sidewalls formed with internal ledges, a rectangular bottom memberdetachably secured to said top member within the side walls of thelatter, and feet embracing the corners of said bottom member and havingshank anges clamped between said bottom member and the ledges of saidtop member, said feet having tread portions adapted to rest upon a latsurface and support said casing.

4. A foot-operated motor controller casing comprising a rectangular topmember having a top and side wall elements the latter of which areformed with internal corner ledges, a rectangular bottom memberdetachably secured to said top member within the side wall elementsthereof, and rubber feet disposed at the corners of said members andhaving flanges overhanging said bottom member and clamped between thelatter and the ledges of said top member.

5. A foot-operated motor controller casing comprising a top memberhaving a top and side wall elements the latter of which are formed withinternal corner ledges, a bottom member detachably secured to said topmember within the side wall elements thereof, and rubber feet havingshank anges overhanging said bottom member and clamped between thelatter and the ledges of said top member, said feet having treadportions underlapping said bottom member.

6. A casing comprising a hollow upper member molded in one piece fromphenolic condensation material and having a top wall and side wallsformed with internal ledges, a bottom member molded from phenoliccondensation material and detachably connected to said upper memberwithin the side walls of the latter, and soft rubber feet for supportingsaid casing, said feet having shank flanges clamped between the bottommember and the ledges of the upper member.

WILFRED O. LANGILLE.

